[DRBD-user] Write performance 0.7.4 versus 0.7.5 on Primary + SyncTarget

Benoit.Ropartz at alcatel.fr Benoit.Ropartz at alcatel.fr
Tue Oct 5 14:29:10 CEST 2004

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Kernel : 2.4.20 (PPC)
DRBD : 0.7.5 & 0.7.4
FileSystem : ext3 / data=journal & sync

Hello,

I copying a file of 512ko on Primary whereas the state of its connection is
SyncTarget.

Results :

0.7.4 DRBD version : 15s (~34k/s)
0.7.5 DRBD version :  4mn33s (~1.8k/s)

Same test with a file of 5Mo.

Results :

0.7.4 DRBD version :  3mn53s (~22 k/s)
0.7.5 DRBD version :  ....too long....(syncing is finished before writing)

With new DRBD release 0.7.5, writing are very slow !!!

Benoit.





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